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libc: zero-initialize anonymous memory from 'mmap()'

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Fixes #3854
This commit is contained in:
Christian Prochaska 2020-08-20 16:15:24 +02:00 committed by Norman Feske
parent 7c1a4522d6
commit 2f55ffdf20
1 changed files with 1 additions and 0 deletions
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repos/libports/src/lib/libc/file_operations.cc
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@ -422,6 +422,7 @@ __SYS_(void *, mmap, (void *addr, ::size_t length,
errno = ENOMEM; errno = ENOMEM;
return MAP_FAILED; return MAP_FAILED;
} }
::memset(start, 0, align_addr(length, PAGE_SHIFT));
mmap_registry()->insert(start, length, 0); mmap_registry()->insert(start, length, 0);
return start; return start;
} }